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. '15 lowing is a specification.

UNITED STATE PAT NT OFFICE.

GUSTAV SPIECKER, or BONN, GERMANY, ASSIGNOROF ours-1mm fro eorr- FRIED HUTTm-IANN, or nn'UX;AUSTRIA-11mm nv.

MANUFACTU-R'E O'F FUEL.

. srncrrrcA'rron forming part of Letters Patent no. 617,867, dated Jamal-y 1 1e99, Application filed Decniber 17, 1895. Serial No. 572,456. No specimens.)

To all .whom itjma'g] concern: Be it known that I, GUSTAV SPIECKER, a subject of the German Emperor, residing at Bon-n on-theRhine, Germany, have invented 5 certain new and useful Improvements in the Manufacture ofB'locks or Briquets of Fuel, (for which Letters Patenthave been obtained in Belgium, No. 113,518, dated January 1, 1895; in France, X0. 225,016,4lated January o 4,1895; in Great Britain, X0283, dated J anuary 4:, 1895; in LuXemburg,No. 2,213, dated January 5, 1895; in Austria, X0. 4:5//1,7T.'2, dated May' ll, 1-895, and in 'IIungary, No. 2,831, dated May 28, 1895,) of which the fol- This invention relates to fuel and to the manufacture of blocks or briquets of fuel from finely dividedcombustibie substances and resin, pitch, or other binding agent employed zo for uniting the material into block form.

One example of such fuel is described in the United States Letters Patentgranted to .me October 24,1893, No. 507,241 According to the process described'in said Letters Patent the finely-divided fuel has been mixed with resin-pitch-that is, the residue left after boiling or distilling conifer-resin at about 200 to 300 centigrade, this boiling being for'the purpose of eliminating the essence of resin known 6 as pinolinand the mixture thus formed was pressed while hot in to the form of briquets by molding-presses.

The present invention aims to provide an improved process for manufacturing such 7 5 fuel and an improved product, and. to this end provides certain features of improvement, which will be hereinafter set forth.

Heretofore' in the manufacture of artificial fuel from small coal or the lil:e--forinstance,

'40 of pit-coal, brown coal,'- coke, &c;--coalta r pitch is generally employed as binding'agent. The coal-tar pitch is a rigid brittle body with very in feriorbindin g power. In consequence thereof it is necessary to employ sev'en-eighths percent. coal-tar pitch for larger fuel-blocks and even ten-twelfths per cent. coal-tarpitchforsmaller fuel briquets, as addition to the,

small coal or coke in'order toobtain resistant and transportabl b iquets'; This absolutely 5o necessary, largf" "ortion of. coal tarp'iteh rious manner thereby.

to be added imparts to tnebriquets verydisagreeable properties, so. as to prevent the enrploymcnt of such briquets for several purposes. Such briquets after,,,h'aving been brought into the fireplace develop while bu an 5 5 inga large quantityof thick, dark, and black smoke, which molests the neighborhood in a very high degree. Railway-locomotives or steam -boiler plants heated with such briqucts cause such inconvenience, which has been seriously felt. In a higher degree such in-. convenience has been felt on passenger-steamers where the passengers being on a relatively small space near to the chimney are soiled audmolested by the large quantities of black bituminous carbon-particles not burned and suspended in the air. Furthermore, greens, herbs, and nuns stored near to such briqucts are badly influenced by the gas developed from the latter and are rendered unservice-' 7o able as nourishment. All these inconveniences are avoided by the present invention, which consists inadding a very small proportion of conifer-resin or of its resin-pitch to the coal-tar pit-c'h and thereby enabling the diminution of the quantity of the latter to be used, so that only one-half of the former amount is requirech Instead of employing the above-stated proportions of coaLtar pitch, it is sufficient with myinvention to use 3.5 to four per cent. of coaltar pitch, or with conifer-resin or its resinpitch as much as corresponds to one-seventh to. one-eighth of this quantity of the coaltar pitch-is used, and in this case a binding agent of an excellent binding power is the result. The briquets thus obtained are transportable, resistant, durable, and stable. Such briquets develop while burning only a small quantityofsmoke and during their 0 storage'seareelya smell caused from gases adhering to the coal-tar pitch. Therefore nourishment-s stored in the neighborhood of s'uch-briquets are not influenced in an inju- The present inventionc'onsists in eliminatingth'e rigid, brittle, and inferiorly'binding property of 'the coal-tar pitch by means of "very, small proportions of coniferresin or'its resin-pitch'a'dded thereto, and thereby effects roe a very importanteconomical success, because the small quantities of resin employed are ,yery much cheaper than the large quantities of-war, because a thick black smoke forms for process I mix With,.say, twoiiiindr'ed parts, by

resin. The gain 'b' important onefor this industry.

The employment of briquets developing very little smokeis highly important for men ininiical artillerya marl; visible at avery great distance; v

In carrying out one form of my improved we'i'ght, of finely-divided carbonaceous material approximately'seven to eight parts, by

weight, of coal-tar pitch and about one part,

by weight,of conifer-resin and I heat the mass up to a temperature of about 570, Fahrenheit until such conifer-resin is reduced to resin pitch and then compress the resnlting mass into blocks.

In order to perform the improved "process; the resin-pitch is preferably secured and ap-' plied by using conifer-resin, which may be (if desired) preliminarily freed in a. more orless degree from its volatile constituents,

which is finely pulverized and then added,

together with coal-tar pitch, to the material to be molded-into briquets and then convertedinto resin-pitch by heating. The resin may also be added to the coal-tar pitch during the Vitnesses: 1

that during the formation of the briquets the resin and the coal-tar pitch are presentinthc coa mat rial; in nely-fl' 'vj d d xs teii-"r t is not essentialdhow the additipn of resin and coal-tarpitcliflia's beenperfiirined. The mix- 7 I tiire of the coal material with the resin and 'with the coalft ar pitch is then heated in any suitable manner up to a temperature of about 570- Fahrenheit (about 300? centigrade) until the resin is converted; ii tozresinapitch, and then the 'mixture'is 'moldedinto briquets by means ofpressure; y

1. The improvedgprocess of manufacturing fuel blocks and briquetsfi'om finely-divided carbonaceous materiaL -Nvhic consists in uniting such mate'rial'by adding ma a quail tity of coal-tar'pitch'less than'is'n'ecessaryto unite the particles of suchmaterial, and l in adding aquantz ty of conifer-resin to saidmaterial suflicien 'vv'ith said coal'stan pitch, to, unite the particles, in heating themassup toa temperature of 570? 1Fahrenheit(3O0 centi- 1 grade) until such conifer-resin. is red need to resin-pitch; ,and "compressing "the resulting g "'"g'y .r j l 1 v 2. The improved process in the manufacture of fuel-briquets from carbonaceousmaterial 1 'i and coal-tar pitch, which process consists in heating saidmaterial, said coal-tar pitch and conifer-resin until such :resin is converted into resin-pitch, andjthencornpressing there-- sultin'gmass; i GUS'PW"SXTIEQKEK'1 RICHARD Scrnvunr, W. HAUPT. 

